LENROOT, Associate Judge.
This is an appeal from a decision of the Board of Appeals of the United States Patent Office, affirming a decision of the Examiner, rejecting claims 1, 2, and 3 of appellant's application for lack of invention over the prior art.
Claim 1 is illustrative of the claims here on appeal, and reads as follows: "1. A piston ring having relatively narrow spaced peripheral side flanges and integral relatively narrow end flanges extending between...
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